As shown in figure "A" of the illustrated block diagram of a central operating system configured for direct digital control, what does the output system block "DIGITAL CONTACT" represent? EL-0095

Correct Answer: Option D — It receives digital outputs from the binary device sensors and conditions these as digital signals for CPU processing.

Digital contact blocks are designed to interface with binary sensors, such as limit switches, pressure switches, or emergency stops. These blocks receive the discrete on/off state of the contact and condition the signal to a standard digital format that the CPU can interpret as a logical high or low state.